非阻塞标准输入输出 [英] Non-blocking stdio

问题描述

我工作，这将在用户输入从控制台服用以及在单独的线程printfing出的程序。我想避免用户所在中途打字什么情况，一个printf在光标一起并打印本身自带。

I'm working on a program which will be taking in user input from the console as well as printfing out in a separate thread. I want to avoid situations where the user is halfway through typing something in and a printf comes along and prints itself at the cursor.

有没有办法做到非阻塞IO在c从控制台窗口？理想情况下，捕捉关键presses或类似的东西，这样什么类型的用户不会出现在屏幕上。我在Ubuntu发展，这是最好的，如果我没有使用之类的东西ncurses的。

Is there a way to do non-blocking io in c from the console window? Ideally, capturing keypresses or something like that such that what the user types doesn't appear on the screen. I'm developing in Ubuntu, and it's best if I don't have to use things like ncurses.

推荐答案

使用的termios 您可以禁用终端回送：

using termios you can disable terminal echoing:

#include <termios.h>

struct termios oflags, nflags;
tcgetattr(fileno(stdin), &oflags);
nflags = oflags;
nflags.c_lflag &= ~ECHO;
nflags.c_lflag |= ECHONL;

if (tcsetattr(fileno(stdin), TCSANOW, &nflags) != 0) {
    /* handle error */
}

然后退出之前（使用 atexit对）必须恢复终端：

if (tcsetattr(fileno(stdin), TCSANOW, &oflags) != 0) {
    /* handle error */
}

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